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What You Need to Know About Pitted Corrosion

The vast majority of the plumbing pipes used in homes these days are made of copper, as opposed to the earlier iron pipes that were common during the first half of the 20th century. Copper is widely preferred now because of its resilience; it is immune to rust and many other kinds of corrosion. However, it is not invincible. There is one kind of corrosion that still dramatically affects copper, one which can cause quite a few problems for you if you’re not careful. Read on to find out more about pitted corrosion.

What Is Pitted Corrosion?

Pitted corrosion is corrosion caused by chlorine particles in the air and soil. The chlorine particles interact poorly with the copper in the pipes, eating through it quite quickly. This is pitted corrosion. The corrosion tends to be focused on a relatively small area of the pipe, quickly opening up small leaks called pinhole leaks. These leaks are only large enough to release a couple of drops of water at a time, which you would think would be too little to cause any real problems. However, you would be mistaken.


Pinhole leaks are far less immediately destructive than something like a pipe rupture. However, on a long enough timeline even a small amount of water can rot away a very large area. The leak is too small to give off any warning signs, so most homeowners don’t even realize that they have a problem until many months later. That’s when they start to notice the wet spots on the walls, and find immense damage around the area of the leak. The only way to defend against these subtle issues is to schedule plumbing maintenance at least once a year.

The Sunny Plumber offers a full range of plumbing maintenance services throughout Tucson, AZ. Call today to schedule an appointment. 

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